Remediator and preparation method thereof and restoration method for heavy metal contaminated soil thereby

A technology for polluted soil and heavy metals, applied in the field of soil remediation, can solve the problems of insignificant effect, small biomass, slow growth, etc., and achieve the effect of reducing the degree of heavy metal pollution, increasing the content of organic matter, and improving soil fertility.

Inactive Publication Date: 2017-08-01
千人计划土壤治理研究院(唐山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, many plants have been found to have a strong ability to accumulate multiple heavy metals at the same time, but most of the reported phytoremediation methods have insignificant effects, slow results, and unstable remediation effects, and are limited by climate and soil environment. , so that these plants have a limited accumulation of heavy metals, which limits their application
Moreover, most of the cu

Method used

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  • Remediator and preparation method thereof and restoration method for heavy metal contaminated soil thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix 30 parts of corn stalk charcoal, 7 parts of calcium carbonate, 6 parts of dolomite, and 6 parts of bentonite according to the weight ratio, and mix well to obtain the mixture I; turn over the mixture I, add water, and stop for 10 days Turn over the pile to obtain mixture II; add 1 part of Trichoderma to the mixture II, stir and mix, then add 5 parts of atomized wood vinegar, and mix evenly. Then, it is pulverized and granulated to obtain a remediation agent for remediating heavy metal-contaminated soil. Wherein, the wood vinegar is crude wood vinegar diluted 300 times.

Embodiment 2

[0041] Mix 40 parts of cotton stalk charcoal, rice husk charcoal and cow dung charcoal, 4 parts of calcium carbonate, 4 parts of dolomite, and 5 parts of bentonite according to the proportion by weight, and mix evenly to obtain the mixture I; Turn the heap, add water, stop turning the heap after 12 days, and obtain the mixture II; add 0.6 parts of Trichoderma to the mixture II, stir and mix, then add 3.5 parts of atomized wood vinegar, and mix evenly. Then, it is pulverized and granulated to obtain a remediation agent for remediating heavy metal-contaminated soil. Wherein, the wood vinegar is crude wood vinegar diluted 400 times.

Embodiment 3

[0043] Mix 60 parts of cotton stalk charcoal and rice husk charcoal, 2 parts of calcium carbonate, 3 parts of dolomite, and 4 parts of bentonite according to the proportion by weight, and mix well to obtain the mixture I; turn over the mixture I, add water , 15 days to stop turning, to obtain mixture II; add 0.2 parts of Trichoderma to the mixture II, stir and mix, then add 2 parts of atomized wood vinegar, and mix evenly. Then, it is pulverized and granulated to obtain a remediation agent for remediating heavy metal-contaminated soil. Wherein, the wood vinegar is crude wood vinegar diluted 500 times.

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Abstract

The invention discloses a remediator for restoration of heavy metal contaminated soil. The remediator is prepared from the following ingredients in parts by weight: 30 to 60 parts of biomass charcoal, 2 to 7 parts of calcium carbonate, 3 to 6 parts of dolomite, 4 to 6 parts of bentonite, 2 to 5 parts of wood vinegar and 0.2 to 1 part of trichoderma. The invention also discloses a restoration method for heavy metal contaminated soil, comprising the following steps of adding the remediator to the heavy metal contaminated soil after the soil is turned over; planting rape in the soil; detecting physical and chemical properties of the soil after harvesting the rape until the rape reaching the harvest period; and repeating the above procedure until the physical and chemical properties of the soil meet the requirements. Soil fertility is improved greatly and the degree of heavy metal pollution is reduced through the method of combining the prepared remediator for restoration of heavy metal contaminated soil with the rape cultivation. Meanwhile, the method is easy to operate and low in cost.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a remediation agent for heavy metal-contaminated soil, a preparation method thereof, and a method for remediating heavy metal-contaminated soil with the remediation agent. Background technique [0002] With the growth of population and the acceleration of industrialization, the pollution of industrial wastes, chemical fertilizers and pesticides is becoming more and more serious, and the quality of farmland soil is degrading day by day. Soil pollution has become one of the main problems that endanger the quality of the global environment and the survival and development of human beings. According to the survey results of soil pollution in my country, the rate of over-standard soil points in cultivated land is close to 20%, and more than 80% of the over-standard points are heavy metals. Soil heavy metal pollution has aroused the concern and attention of the who...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/00B09C1/10C09K101/00
CPCC09K17/40B09C1/00B09C1/105B09C2101/00C09K2101/00
Inventor 巩雪桦李杰
Owner 千人计划土壤治理研究院(唐山)有限公司
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